Anyone use Critical Troops at all? I say we Buff 'em

[Rigs]

This convo has been goin in circles for years already

4* troops - mana or crit?

There are two varieties of four star troops: those that add critical or those that add mana. I realize that any four-star troop is a luxury, but in the happy circumstance where both varieties are available, what do you prefer? Why?